The skin on the body is like chicken skin, clinically known as perifollicular keratosis, may be related to genetic factors, endocrine factors, vitamin deficiency or metabolic disorders. 1. Heredity: Keratosis pilaris has a genetic predisposition and is an autosomal dominant disease, and similar patients can usually be found in the family, which manifests itself as rough skin with a chicken-skin-like appearance, and is most common in the anterior thighs, outer upper arms, cheeks and buttocks. 2. Endocrine factors: patients with hypothyroidism or glucocorticoid therapy may have damage from perifollicular keratosis. 3. Vitamin deficiency or metabolic disorders: Vitamin A, C, B12 and other deficiencies or metabolic disorders can cause keratin accumulation, excessive keratinization and shedding of the skin blocking the hair follicles, causing the formation of perifollicular pimples and chicken-skin-like skin. Keratosis pilaris usually requires no treatment, but if the lesions are severe, it is recommended to go to the hospital and take medication under the doctor’s guidance.